Pencil sharpener



Patented Dec. 5, 1944 UNITE STATES PATENT OFFICE PENCIL smmrnnna Romande Malditch, Montauk Point, N. Y.

Application March 10, 1944, Serial No. 525,828

8 Claims.

, and quickly replaced without necessity for employing any tools andwithout unscrewing any screws which could be lost.

My invention is more fully described by way of an example in theaccompanying specification and drawing in which- Fig. l is an enlargedsectional view of my pencil sharpener;

, Fig. 2 is a top plan view of the same;

Fig. 3 is a sectional view taken on the line 3-3 of Fig. 2;

Fig. 4 is an elevational view of the same;

Fig. 5 is an elevational view of the base portion of the pencilsharpener with the cap portion removed;

Fig. 6 is a top plan view of the sharpener with the cap and kniferemoved:

Fig. 7 is a bottom plan view of the same.

My pencil sharpener consists of a base I which can be made of metal,plastic, or other suitable material, preferably of a cylindrical shape,having a cylindrical side portion and a substantially flat top portion2. A conical opening 3 is provided in the base, the large end of theopening extending to the periphery at the side, the narrow end extendingto the diametrically opposite point where it is in communication withthe top through a rounded opening 5. A narrow slot 6 provides acommunication between the conical, opening and the upper side of thebase. A recess 1 is formed in the upper side of the base for a knife 8,dowel pins 9 extending from the base for engaging corresponding holes inthe knife. The knife is so shaped that its cutting edge I extends intothe opening 3 through a slot 6.

The base is recessed at l2 for a cap l3. Spiral or thread grooves I4 areprovided at the sides of the recess for corresponding projections I atthe inner sides of the cap. A flange l6 at the top of the cap engagesthe top of the base when the cap is screwed tightly in its place. A fiatportion ll of the cap extends toward the central portion of the base,covering the knife 8 and holding the base. The flat portion i1 istapered at both sides as shown in Fig. 2 to provide for any inaccuracyin the adjustment oi the cap on the base so that the flat portion willnot extend over the edge of the knife if the cap is not turned farenough or if it is turned too far. For the same purpose v an opening 20is provided .in the cap, registering with the large end of the opening 3and is elongated at the sides as shown in Fig. 4.

The cap is preferably made of the same diameter as the base and isknurled at 2| in the same manner as the base is knurled at 22. placingthe knife when it becomes dull, the cap is given a quarter of a turn tothe left, bringing the projections l5 opposite the ends 23 of the spiralslots or grooves M thereby allowing the cap to be removed. The knife canbe then lifted from the pins 9 and replaced, clamping the new knife inthe operating position by the cap.

It is understood, of course, that ordinary threads may be used forJoining the cap with the base, but the described connection is preferredsince it lends itself more conveniently to casting or moulding process.

It is understood that my pencil sharpener may be modified withoutdeparting from the spirit of my invention as set forth in the appendedclaims.

I claim as my invention:

l. A pencil sharpener comprising a cylindrical cap; and means toremovably hold the cap on same securely in the operative position on the66 the base, the cap having aportion on top extending over the knife.

2. A pencil sharpener comprising a cylindrical I base having a conicalopening in its side, the large end of the opening extending to theoutside, the narrow end extending to the diametrically opposite pointnear the top of the base, the cylindrical member having a recess in theupper side; a knife removably supported in the recess, the cutting edgeof the blade extending into the conical opening; a cap for the base; andthreaded connections between the cap and the base for holding the cap inposition and'for clamping the knife on the base.

3. A pencil sharpener comprising a cylindrical base having a conicalopening with its large end at the periphery and extending toward thediametrically opposite point near the top of the base, the base havinga. recess at the top; a knife removabiy supported in the recess, theupper side of the knife being parallel to the upper side of the base; atubular cylindrical cap; and means to removably hold the cap on the baseand to clamp the knife on the base by the cap, the periphery of the capforming substantially a cylindrical continuation of the lower portion ofthe base. 1

4. A pencil sharpener comprising a base having a substantially flat topand a conical opening extending from one side of the base diametricallyacross the base, the top of the base having a slot in communication withthe conical opening; a knife, the upper side of the top portion of thebase having a recess for the knife; a cap for the base, the cap and thebase having interconnecting spiral portions for tightening the cap onthe base and for clamping the knife on the base by the cap.

5. A pencil sharpener comprising a body having a flat upper side and aconical opening at the side the base, the cap having a recess at theside for clearing the large opening.

6. A pencil sharpener comprising a body having a substantially fiat topand a. conical opening having its large end at the side of the base andextending with the small opening to the opposite oint on the base nearits top; a knife removably supported in a recess in the upper portion ofthe base, the base having a slot at the top extending into the conicalopening for the sharp edge of the knife; and a cap removably attached tothe base for clamping the knife in its operating position.

'7. A pencil sharpener comprising a base having a conical opening withits large end extending to the outside, the narrow end extending to theopposite side of the base near its top, the upper side of the basehaving a slot extending into the conical opening; a knife removablyfitted in a corresponding recess in the upper side of the base; and acap removably attached to the base and having an opening on top forexposing the cutting edge of the knife, the upper portion of the capbeing arranged to engage the knife and to clamp the knife to the base.

8. A pencil sharpener comprising a base having a conical openingextending from one side of the base to the opposite point at the otherside. the upper side of the base having a. slot in communication withthe conical opening; a knife removably supported on top of the base withthe edge of the knife extending into the conical slot; 9. cap removablyfitted over the base, the cap being of substantially the same width asthe base, the base having a recess for the cap; and means at the cap forclamping the knife in an operating position.

ROMAN on MAIDITCH.

